I'm with Gaigai - I think the book is essential, preferably the One Block Wonder Encore as it includes the detail for all the hollow cubes, which the first book doesn't have.
I think the advice in there to use the 60 degree triangle is good, it is much easier than a ruler too - and she recommends not to trim triangle points - it is much harder to match up seamlines on the hexagons without them.
There are several very good tips in there too, as well as variations on border treatments.
I've made 5 of these quilts but still have the book open when preparing fabric to cut.